A model for time-dependent reliability assessment of structures, subject to cumulating damage due to point seismic overloads, is presented. The deteriorating structural parameter is the capacity of the structure expressed in terms kinematic (monotonic) ductility to conventional collapse. A stochastic process is employed to model the progressive loss of capacity during a time interval of interest. The capacity reduction due to earthquake shocks is analysed for a simple bilinear structural system, for which earthquake damage increments are non-negative independent and identically distributed random variables. The widely used Gamma distribution is adopted to model damage increments. Some approximations are proposed to get handy expressions for the reliability function. Based on these, close-form solutions for life-cycle structural assessment are derived and discussed with respect to different possible knowledge levels. Finally, illustrative examples show applicability within the performance-based earthquake engineering framework.

Time-Dependent Seismic Reliability of Damage-Cumulating Non-Evolutionary Bilinear Systems / Iervolino, Iunio; Chioccarelli, Eugenio; Giorgio, Massimiliano. - (2012), pp. 2893-1-2893-10. (Intervento presentato al convegno 15th World Conference of Earthquake Engineering tenutosi a Lisbon (Portugal) nel 24-28 September 2012).

Time-Dependent Seismic Reliability of Damage-Cumulating Non-Evolutionary Bilinear Systems

IERVOLINO, IUNIO;CHIOCCARELLI, EUGENIO;GIORGIO, MASSIMILIANO
2012

Abstract

A model for time-dependent reliability assessment of structures, subject to cumulating damage due to point seismic overloads, is presented. The deteriorating structural parameter is the capacity of the structure expressed in terms kinematic (monotonic) ductility to conventional collapse. A stochastic process is employed to model the progressive loss of capacity during a time interval of interest. The capacity reduction due to earthquake shocks is analysed for a simple bilinear structural system, for which earthquake damage increments are non-negative independent and identically distributed random variables. The widely used Gamma distribution is adopted to model damage increments. Some approximations are proposed to get handy expressions for the reliability function. Based on these, close-form solutions for life-cycle structural assessment are derived and discussed with respect to different possible knowledge levels. Finally, illustrative examples show applicability within the performance-based earthquake engineering framework.
2012
Time-Dependent Seismic Reliability of Damage-Cumulating Non-Evolutionary Bilinear Systems / Iervolino, Iunio; Chioccarelli, Eugenio; Giorgio, Massimiliano. - (2012), pp. 2893-1-2893-10. (Intervento presentato al convegno 15th World Conference of Earthquake Engineering tenutosi a Lisbon (Portugal) nel 24-28 September 2012).
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/506095
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